2. The arrivals of customers at a drive-in banking window are governed by the Poisson distribution. Each customer requires 5 minutes to transact his or her business at the drive-in window. The average customer arrival rate is 10 per hour. A customer arrives at random. What is the probability that there will be no line and he can be served immediately? NOTE: You should understand the relationship between the Poisson and Exponential distributions to solve this problem.